2 1/2" Ferrules | McMaster-Carr

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304/304L Stainless Steel

316/316L Stainless Steel

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304/304L Stainless Steel

316/316L Stainless Steel

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Flange OD

For Tube Fabrication

For Tube Specifications Met

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23 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

High-Polish Metal Quick-Clamp Sanitary Tube Fittings

Temperature Range: See Gaskets

The smooth finish inside these fittings makes it easy to remove product residue. Also known as aseptic and tri-clamp fittings, they connect with a gasket, a clamp, and another quick-clamp fitting for a fast and easy way to access your line. The pressure rating of the fitting will vary depending on the clamp you choose, and the temperature rating will vary based on the gasket material you choose.

Inch fittings connect to another same-size fitting and squeeze the gasket in between for a tight seal.

304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

3-A certified fittings comply with sanitary standards.

Note: To complete a connection, you’ll need two quick-clamp fittings, a clamp, and a gasket (all sold separately).

Straight Adapters, Tube × Butt-Weld Tube

For Use With: Air, Beverage, Dairy, Food, Water
Tubing:
Inch Fittings: Use with welded 304/304L or 316/316L stainless steel that meets ASTM A269 or ASTM 270
Metric Fittings: Use with welded 304/304L or 316/316L stainless steel
Specifications Met: See table

Fittings with butt-weld end are also known as ferrules; they weld to tubing for a permanent, flush connection.

304 Stainless Steel

For Tube OD
Quick Clamp	Butt Weld	Flange OD	Lg.	Wall Thick.	Specifications Met		Each
Inch
6"	6"	6.57"	2 1/2"	0.205"	3-A Certified 63-04	4322K187	0000000

316/316L Stainless Steel

For Tube OD
Quick Clamp	Butt Weld	Flange OD	Lg.	Wall Thick.	Specifications Met	Certification		Each
Inch
6"	6"	6.57"	2 1/2"	0.205"	3-A Certified 63-04	Material Certificate with Traceable Lot Number and Test Report	50485K187	0000000

304 Stainless Steel Clamps with Wing Nut

For Tube OD	For Flange OD	Max. Pressure	For Tube Specifications Met		Each
6"	6.697"	150 psi @ 72° F	ASTM A269, ASTM A270	4322K157	000000

304 Stainless Steel Clamps with Bolt

For Tube OD	For Flange OD	Bolt Material	Max. Pressure	For Tube Specifications Met		Each
6"	6.78"	304 Stainless Steel	300 psi @ 72° F	ASTM A269, ASTM A270	4322K716	000000

316 Stainless Steel Clamps with Wing Nut and 2-Pin Hinge

For Tube OD	For Flange OD	Max. Pressure		Each
6"	6.57"	430 psi @ 72° F	4052N14	0000000

316 Stainless Steel Clamps with Safety Wing Nut and 2-Pin Hinge

For Tube OD	For Flange OD	Max. Pressure		Each
6"	6.57"	430 psi @ 72° F	4052N24	0000000

316 Stainless Steel Clamps with Double Bolt

For Tube OD	For Flange OD	Bolt Material	Max. Pressure	Specifications Met	Certificate		Each
6"	6.57"	316 Stainless Steel	210 psi @ 72° F	ASME BPVC.VIII	Material Certificate with Traceable Lot Number	4052N36	0000000

316 Stainless Steel Clamps with Recessed Nut, Hole for Lockout, and 2-Pin Hinge

For Tube OD	For Flange OD	Max. Pressure	Certificate		Each
6"	6.57"	430 psi @ 72° F	Material Certificate with Traceable Lot Number	4052N31	0000000

White Nylon Plastic Clamps with Wing Nut

For Tube OD	For Flange OD	Max. Pressure	For Tube Specifications Met		Each
6"	6.57"	150 psi @ 72° F	ASTM A269, ASTM A270	4322K198	0000000

Gaskets

Buna-N gaskets are oil resistant. EPDM gaskets resist water and steam and work well in humid environments. Silicone gaskets withstand high temperatures. Fluoroelastomer gaskets stand up to fuel, oil, and acid condensates. PTFE gaskets withstand harsh chemicals, with the exception of molten alkali metal and elemental fluorine.

Buna-N Rubber
For Tube OD	ID	OD	Thick.	Temp. Range, °F	Color	Specifications Met		Each
6"	5.820"	6.510"	0.203"	-30° to 200°	Black	3-A Certified 18-03, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 177.2600	4509K19	000000
EPDM Rubber
6"	5.820"	6.670"	0.203"	-20° to 300°	Black	3-A Certified 18-03, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 177.2600	1100N19	00000
Silicone Rubber
6"	5.820"	6.510"	0.203"	-40° to 450°	Clear	3-A Certified 18-03, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 177.2600	4520K49	00000
Fluoroelastomer Rubber
6"	5.820"	6.510"	0.203"	-15° to 400°	Black	3-A Certified 18-03, FDA Compliant 21 CFR 177.2600	5044K59	00000
PTFE Plastic
6"	5.820"	6.510"	0.19"	-100° to 500°	White	3-A Certified 20-27, FDA Compliant 21 CFR 177.1550	43315K59	00000

Butt-Weld Fittings for Stainless Steel Tubing

For Use With: See table
Temperature Range: See table
Tubing:
304 Stainless Steel: Use with 304/304L stainless steel that meets ASTM A213, ASTM A269, or ASTM A270, except DIN EN 10357 fittings with only ASTM A269 or ASTM A270
316 Stainless Steel: Use with 316/316L stainless steel that meets ASTM A213, ASTM A269, or ASTM A270, except ASME BPE and DIN EN 10357 fittings with only ASTM A269 or ASTM A270
Specifications Met: See table

Weld these fittings to tubing for a permanent, flush connection that permits smooth flow through a line.

304/304L stainless steel fittings have very good corrosion resistance. 316/316L stainless steel fittings have excellent corrosion resistance.

ASME BPE fittings are polished to a 20 Ra finish for an extra-smooth interior that prevents product buildup and bacteria growth. Use them in pharmaceutical and bioprocessing applications.

Straight Adapters, Tube × Male Threaded Pipe

304/304L Stainless Steel
For Tube OD	Thread Type	Pipe Size	Max. Pressure	Max. Vacuum	Temp. Range, °F	Wall Thick.	For Use With		Each
Polished
3"	NPT	3	350 psi @ 72° F	10 ^-6 torr @ 72° F	-65° to 250°	0.065"	Air, Food, Water	44655K165	000000
316/316L Stainless Steel
Polished
3"	NPT	3	350 psi @ 72° F	10 ^-6 torr @ 72° F	-65° to 250°	0.065"	Air, Food, Water	5237K498	000000

Straight Reducers, Tube

								316/316L Stainless Steel
	For Tube OD (A)	For Tube OD (B)	Max. Pressure	Temp. Range, °F	Wall Thick.	For Use With	Specifications Met	Certification		Each
Polished
2	1"	1/2"	200 psi @ 72° F	-65° to 200°	0.065"	Air, Deionized Water, Pharmaceuticals, Water	ASME BPE	Material Certificate with Traceable Lot Number and Test Report	44655K963	0000000
2	2 1/2"	2"	200 psi @ 72° F	-65° to 200°	0.065"	Air, Deionized Water, Pharmaceuticals, Water	ASME BPE	Material Certificate with Traceable Lot Number and Test Report	44655K967	000000

Short 45° Elbow Connectors, Tube

304/304L Stainless Steel
For Tube OD	Max. Pressure	Max. Vacuum	Temp. Range, °F	Length (A)	Wall Thick.	For Use With		Each
Polished
4"	250 psi @ 72° F	10 ^-6 torr @ 72° F	-65° to 250°	2 1/2"	0.083"	Dairy, Food	44655K59	000000
Dull
4"	250 psi @ 72° F	10 ^-6 torr @ 72° F	-65° to 250°	2 1/2"	0.083"	Air, Food, Water	44675K59	00000
316/316L Stainless Steel
Polished
4"	250 psi @ 72° F	10 ^-6 torr @ 72° F	-65° to 250°	2 1/2"	0.083"	Dairy, Food	5237K59	00000
Dull
4"	250 psi @ 72° F	10 ^-6 torr @ 72° F	-65° to 250°	2 1/2"	0.083"	Air, Food, Water	5237K591	00000

Standard 45° Elbow Connectors, Tube

							316/316L Stainless Steel
For Tube OD	Max. Pressure	Temp. Range, °F	Lg. (A)	Wall Thick.	For Use With	Specifications Met		Each
Polished
1 1/2"	200 psi @ 72° F	-65° to 200°	2 1/2"	0.065"	Air, Deionized Water, Pharmaceuticals, Water	ASME BPE	44655K973	000000